JAR Tools - JAR File Index Specification

JAR File Index Specification

Q

What is the JAR file index specification? What tools can I use to generate the index file?

✍: FYIcenter.com

A

The index file of a JAR file contains directory information as to which classes and resources reside in the JAR file. The index file is stored as META-INF/INDEX.LIST in the JAR file.

The index file specification is given below:

    index file :     version-info blankline section*
    version-info :   JarIndex-Version: version-number
    version-number : digit+{.digit+}*
    section :        body blankline
    body :           header name*
    header :         char+.jar newline
    name :           char+ newline
    char :           any valid Unicode character except NULL, CR andLF
    blankline:       newline newline
    newline :        CR LF | LF | CR (not followed by LF)
    digit:           {0-9}

Here is a sample of a JAR index file, INDEX.LIST:

JarIndex-Version: 1.0

activation.jar
META-INF
javax
javax/activation
com
com/sun
com/sun/activation
com/sun/activation/registries
com/sun/activation/viewers

Back to FAQ on JAR (Java ARchive) File Format.

2016-04-12, 1042👍, 0💬

Tools to Generate and Manage JAR Files
What tools can I use to generate and manage JAR files? There are a number tools you can use to generate and manage JAR files: 1. JDK "jar" Tool - The "jar" tool from the JDK package is probably the best tool to generate and manage JAR files. It offers many features like creating a new JAR file, upda... 2016-04-12, 964👍, 0💬

What Is JMS (Java Message Service)
What Is JMS (Java Message Service)? JMS (Java Message Service) is a standard extension to the Java platform that provides a common way for Java programs to create, send, receive and read an enterprise messaging system�s messages. JMS is a set of interfaces and associated semantics that define how a ... 2016-04-06, 938👍, 0💬

Digital Signatures of JAR Files
What are digital signatures of JAR files? And where are they stored in the JAR file? Digital signatures are encrypted digests of entries archieved in the JAR file. Digital signature information is stored in multiple files under the META-INF path name: META-INF/MANIFEST.MF - Contains digests of JAR e... 2016-04-15, 894👍, 0💬

Per-Entry Attributes of JAR Manifest File
What are per-entry attributes of a JAR manifest file? Per-entry attributes of a JAR manifest file are attributes associated to each individual entry in the JAR file. Per-entry attributes are specified in separate sections, one section per entry. Main attributes fall into the following different grou... 2016-04-15, 879👍, 0💬

All rights in the contents of this web site are reserved by the individual author. FYIcenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.